import uasyncio as asyncio
import machine

class LED():
    def __init__(self, pin):
        self.pin = machine.PWM(machine.Pin(pin,machine.Pin.OUT),freq=2000,duty=0)
        self.pwmDutyOff = 0
        self.pwmDutyOn = 1023
        self.pwmDuty = 0
        self.blinkRateOff = None
        self.blinkRateOn = None
        self.blinkRate = None
        self.onState = False
        self.blinkOn = False
        loop = asyncio.get_event_loop()
        loop.create_task(self._update_async())

    async def _update_async(self):
        while True:
            if self.blinkRate == None or self.blinkRate <= 0:
                await asyncio.sleep_ms(200)
            else:
                self.pin.duty(self.pwmDuty if self.blinkOn else 0)
                self.blinkOn = not self.blinkOn
                # TODO split long waits into multible ones so we catch changes more often
                await asyncio.sleep_ms(int(500 / self.blinkRate))

    def toggle(self):
        self.onState = not self.onState
        self.value(self.onState)

    def setOnState(self, blinkRate = None, pwmDuty = 1023, ):
        self.blinkRateOn = blinkRate
        self.pwmDutyOn = pwmDuty

    def setOffState(self, blinkRate = None, pwmDuty = 0):
        self.blinkRateOff = blinkRate
        self.pwmDutyOff = pwmDuty

    def on(self):
        self.value(True)

    def off(self):
        self.value(False)

    def value(self,value=None):
        if value!=None:
            self.onState = value
            self.blinkRate = self.blinkRateOn if self.onState else self.blinkRateOff
            self.pwmDuty = (self.pwmDutyOn if self.onState else self.pwmDutyOff)
            self.pin.duty(self.pwmDuty if self.blinkOn else 0)
        return self.onState